Method of pasteurizing liquids



Nov. 27, 1928. 1,693,034

A. JENSEN METHOD OF PASTEURIZING LIQUIDS Filed Feb. 2, 1926 3 Sheets-Sheet 1 Nov; 27, 1928 1,693,034

A. JENSEN Y METHOD OF PASTEURIZING LIQUIDS Filed Fe ,.1926 a Sheets-Sheet 2 46' 2' 5 4 28 2 29 Z0 /9 Z4 Z6 23 ZZ M A TTORNEYS.

Nov. 27, 1928. 1,693,034

- A; JENSEN METHOD OF PASTEURIZING LIQUIDS Filed Feb. 2,- 1926 s Sheets-$heet 5 Jjg. 3

INVENTOR.

ATTORNEYS.

Patented Nov, 1928.

UNITED STATES 1,693,034 PATENT OFFICE.

MGR JENSEN, LOS ANGELES, CALIFORNIA.

METHOD OF PASTEUBIZIHG Application fled February 2, 1928. Serial No. 85,471.

An apparatus adapted to carry out my im-- proved method, and hereinafterdescribed and illustrated in the accompanying drawings, shows a form readily applicable to the treatment ofmilk or cream, in which harmful gases are known to be present. These gases may be the result of organic changes, or they may be the outcome of bacteria growth, caused by absorbed flavors orimproper feeding o the dairy cattle. Much trouble is encountered from the latter, and it is a common objection in. many Sections of the country between seasons, when the cattle crave change in diet and feed on weedy plants. Undesirable flavors from other causes are known to be present in milk and cream practically the entire year through, and can be traced to the feeding of turnips, silo, kale, certain legumes, etc.

In the accompanying drawings Figure 1 is a perspective view of a complete assembly including my improved pastcurizer. Figure 2 is a centra vertical sectional view of the pasteurizer and its operating parts.

Figure 3 is a detail perspective view of the exhaust rotor'of said pasteurizer.

Figure 4 is a. detail perspective view partly broken away of the pasteurizer.

Figure 5 is a horizontal sectional view, taken on the line VV of Figure 2.

Figure 6 is a detail view partlyin section of the suction pump employed with the apparatus.

Figure 7 is a sectional View of the pasteurizer showing a slightly modified con struction.

Similar numerals of referencedenote corresponding parts in the several views.

In the said drawings, referring more particularly to Figure 1, the reference numeral'l denotes a'pipe for supplying the liquid to be treated,-the same discharging into the upper tank 2 of a regenerator 3 of the general type disclosed in Letters Patent No. 1,073,989, 55 granted tome September 23, 1913, said liquid after passing through said regenerator dischar I' g into the lower tank 4-thereof,- from whic it is led by pipe 5 into the pasteurizer 6 hereinafter described, wherein it is treated for the removal of gases, and is discharged therefrom through pipe 7 into the lower end of the regenerator 3 up which it passes to impart its heat to the incoming liquid, and from which it is discharged through the pipe 8 to the cooler 9, from which leads a pipe 10 to carry away the treated liquid.

Referring specifically to the pasteurizer 6, the same comprises a metal base 11 supported on legs 12, fastened to which is a cylindrical lining 13 which forms an integral part of a heating jacket 14 constructed with a helical circulating channel 15. A circulating pump 16 is connected with suction pipe 17 and discharge pipe 18, which latter returns to the f jacket 14 through connecting pipe 19. Disposed in discharge pipe 18 is a perforated steam pipe 20 having a controlling valve 21. Conveniently located at the upper portion of the acket 14 is a pressure release valve 22 and a pressure gage 23, their function being to control and record the pressure in the jacket -14,- which in turn will reflect the temperature of the circulating medium used.

On top of the cylindrical lining 13 is mounted a cover 24 having an annular channel 25 merging into a discharge outlet 26 to which is attached the pipe 7 and in which is located a temperature recording device 28. In the center of the cover 24 is located a suitable packed I bearing 29, while through the center of the base 11 is projected a stationary pipe 30 extending upward within the pasteurizer to a suitable height to ermit correct functioning. This pipe serves, 'rst, as a vertical guide for the exhaust rotor, hereinafter described; and, secondly, as a draw-off pipe. connected to the suction pump 31, shown in detail in Figure 6,

the same being'driven by a suitable electric motor 32 and discharging through pipe 33. Formed centrally in the base 11, surround- .ing the pipe 30, is a chamber 34 into which 1 the liquid to be treated is introduced by pipe 5, said pipe being controlled by a suitable valve 35.

In Figure 3 I have shown in detail the exhaust rotor within the pasteurizer 6, which is constructed especially to withstand high speed and with attendant ability-to develop pressure. The embodiment of the same emraces a hollow shaft 36 adapted to fit over the tube 30 and fastened to which are two or more cylindrical disks 37 said disks saw the pasteurizer and said pipe 30.

ing to carry vertical vanes 38 and also to confine the liquid being treated so as to prevent splashing in its passage through the pasteurizer. The bottom disk 37 is iniperforate, and is fitted with radial vanes 39 in order to secure a maximum centrifugal action on the liquid entering from the chamber 34 through the apertures 40, said vanes also serving to prevent the exhaust fan or pump 31 from drawing out the ,liquid being treated. remaining disks37 are provided with apertures 41 to permit the free passage therethrough of gases in the liquid so that they may escape toward the exhaust outlet through the pipe 30, as hereinafter described. That portion of the hollow shaft 36 which lies above the' upper end of the pipe 30, is provided with a plurality of apertures 36 to provide communication between the interior of Said exhaust rotor is intended to be supported inde pendently of the pasteurizcr casing and to accomplish this I provide a combined overhead drive and support for the same carried by a casting 42. Said drive comprises a drive shaft 43, connected to the hollow shaft 36 by intermediate shaft connections 44, 44, having suitable detachable joints 45, said shaft 43 having fixed thereto a pulley 46 and being carried by suitable thrust bearing 46 designed to support the weight of the rotor and its parts. Running from said pulley 46 over idler pulleys 47 is a drive belt 48, extend ing to a pulley 49 mounted on shaft 50 driven by a suitable electric moto'r 51. The circulating pump 16 is also driven by said shaft 50, as clearly shown in Figure 1.

The operation of my improved apparatus is as follows: The apparatus is cleaned and steam then turned on through Valve 21 and circulated through the jacket of the pasteurizer by means of the pump 16. As soon as the desired temperature has been obtained, the liquid to be treated is introduced through pipe 5, its flow being regulated by the valve 35 therein. The speed of the suction pump 31 is gaged to produce a predetermined partial vacuum in the pipe 30, which at all times must balance with the pressure in the pasteurizer,

and also must be maintained inproper relation to the boiling pressure of the liquid being treated as the temperature of the same increases progressively. The liquid entering chamber 34 is discharged through apertures 40 into the interior of the pasteurizer 6, and is subjected, first, to the action of the radial vanes 39 to impart a centrifugal movement thereto, and as it rises in the pasteurizer, is

subjected further to the action of'the vertical vanes 38, the latter rotating at high speed; the result being that the liquid gradually rises in the pasteurizer, but is kept away from the Thehollow shaft 36, and is discharged first into the annular channel 25 and from thence into the discharge 26 and its pipe 7, whereby it is conveyed to the lower end of the regenerator 3, as hereinbefore described.

It will be observed that while the liquid is being so treated in the pasteuriz'er 6, the deleterious gases are being withdrawn constantly by the centrifugal pump 31, acting on pipe 30 and discharging through pipe 33.

While the apparatus shown is adapted especially for the treatment of milk and "cream, I do not Wish to limit myself to the treatment of these products, as there are many other liquids that can be treated beneficially by my tor mounted upon a stub bearing 53' formed on top of the chamber 34, said chamber being supplied with the liquid to be treated by a apparatus. Nor do I limit myself to the parpipe 54 discharging directly thereinto and leading from the tank 4 of the regenerator 3. The discharge of gases is through a pipe 55 tapped centrally into the top of the cover 24, said pipe 55 leading to the suction pump 31.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The method of pasteurizing liquids, which consists in subjecting the same, while circulating througlra closed chamber, to a centrifugal action, subjecting the same to a heating medium, 'and simultaneously with drawing therefrom through the center of the chamber, the deleterious gases therein.

2. The method of pasteurizing liquids and I removing volatile matter therefrom, which comprises sub ecting-said liquids to a strong centrifugal force to form a central spacevoid of liquid, heating the liquids to a pasteurizing temperature and simultaneously permanently removing the volatile matter from the liquids bymeans of suction applied to said central space.

3. The method of pasteurizing liquids,

which comprises subjecting the liquids in a closed chamber to a sufficiently strong 'centrifugal action to cause said liquids to rise up on the side walls of said chamber, raisingthe temperature of the liquids to effect pasteur- I ization by means of a heating fluid under pressure, and withdrawing deleteriousgases;

centrally from said chamber by means of suetlOIl. ag, 51

In testimony whereof I'hereunto 'flllliijiflny signature.

- AAGE mas-ta; 

